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Revision of the Swedish Species of Neoxorides Clément, 1938 ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: European Journal of Taxonomy Jahr/Year: 2020 Band/Volume: 0680 Autor(en)/Author(s): Johansson Niklas, Klopfstein Seraina Artikel/Article: Revision of the Swedish species of Neoxorides Clément, 1938 (Ichneumonidae: Poemeniinae) with the description of a new species and an illustrated key to species 1-29 European Journal of Taxonomy 680: 1–29 ISSN 2118-9773 https://doi.org/10.5852/ejt.2020.680 www.europeanjournaloftaxonomy.eu 2020 · Johansson N. & Klopfstein S. This work is licensed under a Creative Commons Attribution License (CC BY 4.0). Research article urn:lsid:zoobank.org:pub:A8502F37-B3B5-49FC-9CBE-BA993BD426AA Revision of the Swedish species of Neoxorides Clément, 1938 (Ichneumonidae: Poemeniinae) with the description of a new species and an illustrated key to species Niklas JOHANSSON 1,* & Seraina KLOPFSTEIN 2 1 Baskarp Fredriksberg 1, 566 92 Habo, Sweden. 2 Naturhistorisches Museum Basel, Augustinergasse 2, CH-4001 Basel, Switzerland. * Corresponding author: [email protected] 2 Email: [email protected] 1 urn:lsid:zoobank.org:author:B0031F47-99F7-4FEE-B545-B6F1E79E1A4E 2 urn:lsid:zoobank.org:author:4F22C48F-2D0E-4554-95C9-01D2635E3146 Abstract. Neoxorides Clément, 1938 is a small genus of ichneumonid wasps that develop on wood- boring beetles. We here revise the Western Palaearctic species of the genus, with a special focus on Sweden. A new species, N. striatus Johansson sp. nov. is described. Neoxorides opacus (Kokujev, 1903) stat. rev. is excluded from the synonymy with N. nitens (Gravenhorst, 1829) and reinstated as a valid species. The species is redescribed from European material. Neoxorides kissi (Ulbricht, 1911) is confi rmed as a junior synonym of N. opacus. A neotype for N. opacus is designated. New characters to distinguish N. varipes (Holmgren, 1860), N. collaris (Gravenhorst, 1829) and N. montanus Oehlke, 1966 are presented. Almost all of the species treated are supported by DNA-barcoding. An illustrated key to the species occurring in the Western Palaearctic is provided, a prerequisite for making the genus accessible for future ecological and conservation studies. Keywords. Saproxylic, molecular, new species, review, barcoding. Johansson N. & Klopfstein S. 2020. Revision of the Swedish species of Neoxorides Clément, 1938 (Ichneumonidae: Poemeniinae) with the description of a new species and an illustrated key to species. European Journal of Taxonomy 680: 1–29. https://doi.org/10.5852/ejt.2020.680 Introduction Our knowledge of species diversity in insects is still embarrassingly incomplete, even in relatively well-known regions such as Europe. A large inventory based on millions of insect specimens from the Swedish Malaise Trap Project (SMPT) recently concluded that the largest gaps in our knowledge are among dipteran decomposers and hymenopteran parasitoids (Ronquist et al. 2020), such as Ichneumonidae Latreille, 1802 (also called “Darwin wasps” since recently: Klopfstein et al. 2019). Even small and easily recognized genera still hold undetected diversity, if examined carefully. We here revise the Western Palaearctic species of Neoxorides Clément, 1938, using a combination of morphological and molecular data. 1 European Journal of Taxonomy 680: 1–29 (2020) Neoxorides belongs to the ichneumonid subfamily Poemeniinae Narayanan & Lal, 1953. It is a small Holarctic genus currently comprising 10 described species worldwide (Yu et al. 2016). The species are assumed to be idiobiont ectoparasitoids of various xylophagous Coleoptera Linnaeus, 1758, primarily Cerambycidae Latreille, 1802 and Buprestidae Leach, 1815 (Broad et al. 2018). It shall hereby be noted that there are many unreliable host associations in the literature, where specimens of Neoxorides have been reared from wood containing multiple species of Coleoptera as well as hole-nesting aculeates (Broad et al. 2018). The Western Palaearctic species were revised by Oehlke (1966), who recognized four species: Neoxorides nitens (Gravenhorst, 1829), N. collaris (Gravenhorst, 1829), N. varipes (Holmgren, 1860) and N. montanus Oehlke, 1966. The fauna of North America was revised by Townes et al. (1960) and the Oriental fauna has partly been treated by Uchida (1928) and Sheng (1998). Kanders (2009), revised the Swedish species of Poemeniinae, including Neoxorides, in a Master’s degree project at Uppsala University. However, the study only recognized two species, Neoxorides collaris and N. varipes. The genus Neoxorides in the Western Palaearctic is distinguished from all but one similar genera by the elongate and slender legs and body (Figs 1A, 8B), the relatively long ovipositor in the female and the coarsely sculptured temples, which have a scale-like structure (Fig. 1B). These features are also found in the closely related genus Podoschistus Townes, 1957, which has the tergites distinctly and densely punctate, in contrast to the smoother and fi nely shagreened tergites in Neoxorides. This paper reviews the Swedish species of Neoxorides. Six species are recognized and revised taxonomically using morphological and molecular methods. Material and methods Specimen base and morphological analyses About 150 specimens of Neoxorides in private and public collections in Sweden and to some extent other countries, as well as relevant type material, were studied and sorted out by the fi rst author. Some of the studied specimens were then barcoded by the second author to support the conclusions presented by the morphological and taxonomical analysis (see below). The material collected by the Swedish Malaise Trap Project seems to be lost (Dave Karlsson, SMTP, pers. comm.), but has been treated partly by Kanders (2009) and Olexandr Varga (unpublished data; Dave Karlsson, SMTP, pers. comm.). Since none of these authors were aware of the true diversity of the genus in Sweden, these records are not relisted. Morphological terminology follows Broad et al. (2018). Fore wing length is measured as the greatest distance from the apex of the tegula to the wing tip. Unless stated otherwise, close up photos were taken by Alexander Berg with a Canon EOS 6D with a reversed tube lens-Thorlabs ITL200 with either a Schneider Kreuznach Componon 28 mm f4 or a Schneider Kreuznach Componon-S 50 mm f2.8 and then stacked with Zerene Stacker. Geographical regions with abbreviations are depicted in Fig. 2. Depositories (corresponding curator / contact) HNHM = Hungarian Natural History Museum, Budapest, Hungary (Zoltán Vas) JA = Collection of Johan Abenius, Nynäshamn, Sweden (Johan Abenius) JH = Collection of Jacek Hilszczański, Forest Research Institute, Poland (Jacek Hilszczański) LW = Collection of Lars-Ove Wikars, Borlänge, Sweden (Lars-Ove Wikars) MNHN = Muséum national d’histoire naturelle Paris, France (Claire Villement) MR = Collection of Matthias Riedel, Bad Fallingbostel, Germany (Matthias Riedel) MZH = Finnish Museum of Natural History, Helsinki, Finland (Juho Paukkunen) MZLU = Zoologiska Museet, Lunds Universitet, Lund, Sweden (Rune Bygebjerg) NHMUK = Natural History Museum, London, United Kingdom (Gavin Broad) 2 JOHANSSON N. & KLOPFSTEIN S., Revision of the Swedish species of Neoxorides NHRS = Swedish Museum of Natural History, Stockholm, Sweden (Hege Vårdal) NJ = Collection of Niklas Johansson, Habo, Sweden (Niklas Johansson) NMWU = Museum of Natural History, Wroclaw University, Poland (Marek Wanat) OV = Collection of Olexandr Varga, Kiev, Ukraine (Olexander Varga) SLU = Collection of the Swedish University of Agricultural Sciences, Uppsala, Sweden (Mats Jonsell) UPSZ = Evolutionsmuseet, Uppsala University, Uppsala, Sweden (Hans Mejlon) ZIN = Zoological Institute, Russian Academy of Sciences, St Petersburg, Russia (Andrey Khalaim) ZMHB = Museum für Naturkunde, Berlin, Germany (Jutta Helbig, Lukas Kirschey) ZSM = Zoologishe Staatsammlung München, Germany (Stefan Schmidt) Fig. 1. Neoxorides striatus Johansson sp. nov., holotype ♂ (BC ZSM HYM07485). A. Habitus, lateral view. B. Head, anterior view. C. Mesopleuron, lateral view. Photos: Stefan Schmidt. 3 European Journal of Taxonomy 680: 1–29 (2020) Fig. 2. Map of Sweden with borders and used abbreviations of the faunistic provinces from south to north: Sk = Skåne, Bl = Blekinge, Ha = Halland, Sm = Småland, Öl = Öland, Go = Gotland, Ög = Östergötland, Vg = Västergötland, Bo = Bohuslän, Ds = Dalsland, Nä = Närke, Sö = Södermanland, Up = Uppland, Vs = Västmanland, Vr = Värmland, Dr = Dalarna, Gä = Gästrikland, Hs = Hälsingland, Me = Medelpad, Hr = Härjedalen, Jä = Jämtland, Ån = Ångermanland, Vb = Västerbotten, Nb = Norrbotten, Ås = Åsele lappmark, Ly = Lycksele lappmark, Pi = Pite lappmark, Lu = Lule lappmark, To = Torne lappmark. 4 JOHANSSON N. & KLOPFSTEIN S., Revision of the Swedish species of Neoxorides DNA extraction One to four specimens of N. collaris, N. montanus and N. opacus (Kokujev, 1903) were subjected to molecular analysis. Extractions were unsuccessful for N. varipes, for which no suitable material was available. Additional barcodes for N. striatus Johansson sp. nov., N. nitens and the North American N. caryae (Harrington, 1891), as well as a sequence of Podoschistus vittifrons (Cresson, 1868) to be used as an outgroup, were obtained from GenBank and from the Barcoding Fauna-Bavarica project. DNA was extracted from mid or hind legs using the Qiagen DNeasy Blood & Tissue kits according to the manufacturer’s instructions, but allowing 16–18 hours for the digestion step.
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